205656780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{489659}}^1$

素因数の和:489678

約数の個数: 48

約数和(自身を含む): 658103040

約数和(自身を除く): 452446260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 489659, 979318, 1468977, 1958636, 2448295, 2937954, 3427613, 4896590, 5875908, 6855226, 7344885, 9793180, 10282839, 13710452, 14689770, 17138065, 20565678, 29379540, 34276130, 41131356, 51414195, 68552260, 102828390, 205656780]

約数ペア:

[(1, 205656780), (2, 102828390), (3, 68552260), (4, 51414195), (5, 41131356), (6, 34276130), (7, 29379540), (10, 20565678), (12, 17138065), (14, 14689770), (15, 13710452), (20, 10282839), (21, 9793180), (28, 7344885), (30, 6855226), (35, 5875908), (42, 4896590), (60, 3427613), (70, 2937954), (84, 2448295), (105, 1958636), (140, 1468977), (210, 979318), (420, 489659)]